He then taught full time at Seton Hall University School of Law.

In April 1990, he rejoined the firm, then known as Crummy, Del Deo, Dolan, Griffinger & Vecchione. Gibbons’ name was added to the firm, thereafter, and in 2007 the firm was renamed to bear only his name: Gibbons, an Am Law 200 firm that currently has roughly 175 lawyers in six offices.